Newspapers are two-sided platforms that sell their product both to readers and advertisers. Media firms in general, and newspapers in particular, are considered important providers of information, culture and language in most countries. Newspapers are therefore given preferential tax treatment....

In diesem Beitrag untersuchen wir die Wirkung einer veränderten Regelung für Sozialhilfe auf das Arbeitsangebot. Die unterstellte Neuregelung zeichnet sich dadurch aus, daß der implizite Steuersatz für das Arbeitseinkommen von Transferempfängern von derzeit 100 vH auf einen niedrigeren Wert...

This paper generalizes the frequently used Hotelling model for two-sided markets in order to determine the equilibrium market shares. We show that advertisement levels depend neither on the media price nor on the location of the media firm. An increase in advertising revenues does not change...

This paper examines how trade liberalization affects the innovation incentives of firms, and what this implies for industry productivity. For this purpose we develop a reciprocal dumping model of international trade with heterogeneous firms and endogenous R&D. Among the robust results that hold...

This paper develops an efficiency theory of contingent trade policies. We model the competition for a domestic market between one domestic and one foreign firm as a pricing game under incomplete information about production costs. The cost distributions are asymmetric because the foreign firm...

The Earth Summit in Rio was expected to pave the way for more and effective cooperation with respect to biodiversity. This paper discusses the approaches which were adopted at the summit and the benefits of biodiversity which are closely related to innovations of the biotechnology industries....

This paper sheds some light on the possible implications of compensations which are paid for the maintenance of an environmental stock. It shows that serious complications can arise if the resource-owner can vary the compensation price. In that case, extraction-driven stock preservation policies...